There are few grimmer symbols for the devastation of the Iraq War than what it did to Baghdad's once-diverse neighborhoods. The map on the left shows the city's religious make-up in 2005. Mixed neighborhoods, then the norm, are in yellow. The map on right shows what it looked like by 2007, after two awful years of Sunni-Shia killing: bombings (shown with red dots), death squads, and militias. Coerced evictions and thousands of deaths effectively cleansed neighborhoods, to be mostly Shia (blue) or mostly Sunni (red). Since late 2012, the sectarian civil war has ramped back up, in Baghdad and nationwide.